Knee pad



FIG. 1 is a perspective view of a knee pad showing my new design, the person shown in broken lines is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is an enlarged front elevational view thereof;

FIG. 3 is a top plan view thereof, the bottom view being a mirror image;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a side elevational view thereof, the opposite side being a mirror image. 

The ornamental design for a knee pad, as shown and described. 